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(-i- before vowel, & before consonant exc. as shown), pref. =L& Greek tri-three-, having or composed of three, triple, as: -adelphous, with stamens in 3 sets; -androus, with 3 stamens; -apsidal, with 3 apses; -basic, with 3 hydrogen atoms replaceable by base or basic radical; -brachial, (-k-), three-armed implement &c., esp. a flint implement; -capsular (bot., zool.), with 3 capsules (to each flower); -carpous, bearing 3 fruits or carpels; -centenary, =TERCENTENARY; -chord (-k-) a. & n., three-stringed (instrument esp. lute), (of piano) with 3 strings to each note; -chromatic, three-coloured, (of the eye) having the normal three colour sensations, i.e. red, green, & purple, so -chromatism n.; -corn, having 3 horns, (n.) three-cornered hat, (pop., also -corne) French gendarme\'s two cornered hat; -corporal, -corporate, (-at), (herald.) having 3 bodies& one head; -cotyledonous, with 3 cotyledons; -cortic, (of pulse) with 3 beats; -cuspid, with 3 cusps or points, as t. valve of heart, t. murmur (heard when this is deranged); -dactyl (ous), with 3 fingers or toes; -dentate, with 3 teeth or prongs; -digitate, = -dactyl; -dimensional, of 3 dimensions; -facial a. & n., (of) the trigeminus; -floral, -florous, bearing 3 flowers; -foliate, -ated, -foliolate, (of compound leaf) with 3 leaflets, (of plant) having such leaves; -form-( ed), formed of 3 parts, having 3 forms or bodies; -furcate (-at) a., divided into three forks, (v.t. & i., -at) divide thus; -geminal a. & n., triple, (of) the trigeminus; -geminus, cranial nerve with the 3 functions of motion, common sensation, & taste; -glot, written in 3 languages; -goneutic (entom.), having 3 broods in a year; -gram, -graph, group of 3 letters representing one sound; -gynous (trij-), having 3 pistils; -hedral, with 3 surfaces; -jugate, -jugous, (bot.), having, arranged in, 3 pairs; -labe, three-pronged surgical instrument for removing calculi &c.; -labiate, three-lipped; -laminar, of 3 layers; -lateral, of 3 sides, so -laterally adv.; -lemma, choice between 3 things; -linear, of 3 lines; -lingual, of, expressed in, 3 languages; -literal, of 3 letters, (of Semitic languages) having (most of) their roots in 3 consonants, so -literalism, -literality, nn.; -lith, monument of 3 stones, esp. two upright& one across their tops, so -lithic a.; -labiate, three-lobed; -lobite, member of palaeozoic group of animals with body in 3 main divisions, so -lobitic a.; -locular, with 3 cells or compartments; -mensual, -mestr (i)al, occurring every 3 months; -merous, of 3 members or joints (also 3-merous); -mor-phism, -morphous, (biol., bot., crystallog.), existence, existing, in 3 distinet forms; -ner-vate, three-nerved; -nodal (anat., bot.), having 3 joints; -nomial a. & n., (technical name, algebraical expression) consisting of 3 terms; -nomialism, use of 3 terms in naming objects in natural history; -oecious (-es-), having male, female, & hermaphrodite flowers each on different plants; -oxide, oxide containing 3 oxygen atoms; -pennate, = -pinnate; -petalous, having 3 petals; -phthong (-1-), 3 vowels forming one sound; -phthongal (-nggl), so formed; -phyllous, three-leaved; -pinnate, having 3 series of leaflets; -radial, -radiat (ed), radiating in 3 directions; -serial, -seriate, (anat., bot.) disposed in 3 rows; -spermous, containing 3 seeds; -sporous, -sporic, having 3 spores; -stichous (tristik-) (bot.), arranged in 3 vertical rows; -stigmatic, -stylous, (bot.), having 3 stigmas, styles; -sulcate, (bot.) three-grooved, (zool.) divided into 3 digits or hoofs; -ternate (bot.), thrice ternate, having 27 leafiets; -tone, (mus.) interval of 3 tones; -valent (tri-) (chem.), having combining power of 3.